Operating method at dormant BWP in wireless communication system and terminal using same method

ABSTRACT

The present specification relates to a method for receiving dormant bandwidth part (BWP) configuration information, performed by a terminal in a wireless communication system, the method comprising: receiving the dormant BWP configuration information from a base station, wherein the dormant BWP configuration information is information about a downlink BWP used as the dormant BWP among at least one downlink BWP set to the terminal; receiving, from the base station, downlink control information (DCI) notifying activation of the dormant BWP; and stopping monitoring of a physical downlink control channel (PDCCH) on the dormant BWP, wherein a BWP inactivity timer is not used on the basis of the activation of the dormant BWP, and the BWP inactivity timer is a timer for a transition to a default BWP.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of US application Ser. No.17/708,788, filed on Mar. 30, 2022, which is a continuation pursuant to35 U.S.C. § 119(e) of International Application PCT/KR2020/011771, withan international filing date of Sep. 2, 2020, which claims the benefitof U.S. Provisional Patent Application No. 62/910,377, filed on Oct. 3,2019, the contents of which are hereby incorporated by reference hereinin their entirety.

BACKGROUND OF THE DISCLOSURE Field of the Disclosure

The present disclosure relates to wireless communication.

Related Art

As a growing number of communication devices require highercommunication capacity, there is a need for advanced mobile broadbandcommunication as compared to existing radio access technology (RAT).Massive machine-type communication (MTC), which provides a variety ofservices anytime and anywhere by connecting a plurality of devices and aplurality of objects, is also one major issue to be considered innext-generation communication. In addition, designs for communicationsystems considering services or user equipments (UEs) sensitive toreliability and latency are under discussion. Introduction ofnext-generation RAT considering enhanced mobile broadband communication,massive MTC, and ultra-reliable and low-latency communication (URLLC) isunder discussion. In the disclosure, for convenience of description,this technology may be referred to as new RAT or new radio (NR).

In the NR system, each serving cell may be configured with a pluralityof (e.g., maximum 4) bandwidth parts (BWP). Accordingly, a dormancyoperation for each cell and/or BWP needs to be defined.

SUMMARY

According to an embodiment of the present disclosure, there is provideda method, wherein a BWP inactivity timer is not used based on activationof the dormant BWP, and the BWP inactivity timer is a timer for atransition to a default BWP.

According to an embodiment of the present disclosure, when userequipment (UE) is in the dormant BWP, the existing BWP inactivity timeris not used. Accordingly, when the UE is in dormant BWP for powersaving, a forcible (unintentional) transition to a default BWP by the UEcan be resolved.

Effects obtained through specific examples of this specification are notlimited to the foregoing effects. For example, there may be a variety oftechnical effects that a person having ordinary skill in the related artcan understand or derive from this specification. Accordingly, specificeffects of the disclosure are not limited to those explicitly indicatedherein but may include various effects that may be understood or derivedfrom technical features of the disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a system structure of a next generation radio accessnetwork (NG-RAN) to which NR is applied.

FIG. 2 illustrates a functional division between an NG-RAN and a 5GC.

FIG. 3 illustrates a frame structure applicable in NR.

FIG. 4 illustrates CORESET.

FIG. 5 is a diagram illustrating a difference between a related artcontrol region and the CORESET in NR.

FIG. 6 illustrates an example of a frame structure for new radio accesstechnology.

FIG. 7 is an abstract schematic diagram illustrating hybrid beamformingfrom the viewpoint of TXRUs and physical antennas.

FIG. 8 illustrates the beam sweeping operation for a synchronizationsignal and system information in a downlink (DL) transmission procedure.

FIG. 9 shows examples of 5G usage scenarios to which the technicalfeatures of the present disclosure can be applied.

FIG. 10 illustrates a scenario in which three different bandwidth partsare configured.

FIG. 11 is a flowchart of a method of receiving dormant BWPconfiguration information according to an embodiment of the presentspecification.

FIG. 12 illustrates dormant behavior.

FIG. 13 illustrates an example of the BWP operation of the UE.

FIG. 14 illustrates another example of the BWP operation of the UE.

FIG. 15 is a flowchart of a method of receiving dormant BWPconfiguration information from the viewpoint of a UE according to anembodiment of the present specification.

FIG. 16 is a block diagram of an example of an apparatus for receivingdormant BWP configuration information from the viewpoint of a UEaccording to an embodiment of the present specification.

FIG. 17 is a flowchart of a method of transmitting dormant BWPconfiguration information from the viewpoint of a UE according to anembodiment of the present specification.

FIG. 18 is a block diagram of an example of an apparatus fortransmitting dormant BWP configuration information from the viewpoint ofa base station according to an embodiment of the present specification.

FIG. 19 illustrates a communication system 1 applied to the disclosure.

FIG. 20 illustrates a wireless device that is applicable to thedisclosure.

FIG. 21 illustrates another example of a wireless device applicable tothe present disclosure.

FIG. 22 illustrates a signal processing circuit for a transmissionsignal.

FIG. 23 illustrates another example of a wireless device applied to thedisclosure.

FIG. 24 illustrates a hand-held device applied to the disclosure.

FIG. 25 illustrates a vehicle or an autonomous driving vehicle appliedto the disclosure.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

As used herein, “A or B” may mean “only A”, “only B”, or “both A and B”.That is, “A or B” may be interpreted as “A and/or B” herein. Forexample, “A, B or C” may mean “only A”, “only B”, “only C”, or “anycombination of A, B. and C”.

As used herein, a slash (/) or a comma (,) may mean “and/or”. Forexample, “A/B” may mean “A and/or B”. Therefore, “A/B” may include “onlyA”, “only B”, or “both A and B”. For example, “A, B, C” may mean “A, B,or C”.

As used herein, “at least one of A and B” may mean “only A”, “only B”,or “both A and B”. Further, as used herein, “at least one of A or B” or“at least one of A and/or B” may be interpreted equally as “at least oneof A and B”.

As used herein, “at least one of A, B, and C” may mean “only A”, “onlyB”, “only C”, or “any combination of A. B, and C”. Further, “at leastone of A, B, or C” or “at least one of A, B, and/or C” may mean “atleast one of A. B, and C”.

As used herein, parentheses may mean “for example”. For instance, theexpression “control information (PDCCH)” may mean that a PDCCH isproposed as an example of control information. That is, controlinformation is not limited to a PDCCH, but a PDCCH is proposed as anexample of control information. Further, the expression “controlinformation (i.e., a PDCCH)” may also mean that a PDCCH is proposed asan example of control information.

Technical features that are separately described in one drawing may beimplemented separately or may be implemented simultaneously.

Layers of a radio interface protocol between the UE and the network canbe classified into a first layer (L1), a second layer (L2), and a thirdlayer (L3) based on the lower three layers of the open systeminterconnection (OSI) model that is well-known in the communicationsystem. Among them, a physical (PHY) layer belonging to the first layerprovides an information transfer service by using a physical channel,and a radio resource control (RRC) layer belonging to the third layerserves to control a radio resource between the UE and the network. Forthis, the RRC layer exchanges an RRC message between the UE and the BS.

A PHY layer provides an upper layer with an information transfer servicethrough a physical channel. The PHY layer is connected to a mediumaccess control (MAC) layer which is an upper layer of the PHY layerthrough a transport channel. Data is transferred between the MAC layerand the PHY layer through the transport channel. The transport channelis classified according to how and with what characteristics data istransferred through a radio interface.

Data is moved between different PHY layers, that is, the PHY layers of atransmitter and a receiver, through a physical channel. The physicalchannel may be modulated according to an Orthogonal Frequency DivisionMultiplexing (OFDM) scheme, and use the time and frequency as radioresources.

The functions of the MAC layer include mapping between a logical channeland a transport channel and multiplexing and demultiplexing to atransport block that is provided through a physical channel on thetransport channel of a MAC Service Data Unit (SDU) that belongs to alogical channel. The MAC layer provides service to a Radio Link Control(RLC) layer through the logical channel.

The functions of the RLC layer include the concatenation, segmentation,and reassembly of an RLC SDU. In order to guarantee various types ofQuality of Service (QoS) required by a Radio Bearer (RB), the RLC layerprovides three types of operation mode: Transparent Mode (TM),Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provideserror correction through an Automatic Repeat Request (ARQ).

The RRC layer is defined only on the control plane. The RRC layer isrelated to the configuration, reconfiguration, and release of radiobearers, and is responsible for control of logical channels, transportchannels, and PHY channels. An RB means a logical route that is providedby the first layer (PHY layer) and the second layers (MAC layer, the RLClayer, and the PDCP layer) in order to transfer data between UE and anetwork.

The function of a Packet Data Convergence Protocol (PDCP) layer on theuser plane includes the transfer of user data and header compression andciphering. The function of the PDCP layer on the user plane furtherincludes the transfer and encryption/integrity protection of controlplane data.

What an RB is configured means a process of defining the characteristicsof a wireless protocol layer and channels in order to provide specificservice and configuring each detailed parameter and operating method. AnRB can be divided into two types of a Signaling RB (SRB) and a Data RB(DRB). The SRB is used as a passage through which an RRC message istransmitted on the control plane, and the DRB is used as a passagethrough which user data is transmitted on the user plane.

If RRC connection is established between the RRC layer of UE and the RRClayer of an E-UTRAN, the UE is in the RRC connected state. If not, theUE is in the RRC idle state.

A downlink transport channel through which data is transmitted from anetwork to UE includes a broadcast channel (BCH) through which systeminformation is transmitted and a downlink shared channel (SCH) throughwhich user traffic or control messages are transmitted. Traffic or acontrol message for downlink multicast or broadcast service may betransmitted through the downlink SCH, or may be transmitted through anadditional downlink multicast channel (MCH). Meanwhile, an uplinktransport channel through which data is transmitted from UE to a networkincludes a random access channel (RACH) through which an initial controlmessage is transmitted and an uplink shared channel (SCH) through whichuser traffic or control messages are transmitted.

Logical channels that are placed over the transport channel and that aremapped to the transport channel include a broadcast control channel(BCCH), a paging control channel (PCCH), a common control channel(CCCH), a multicast control channel (MCCH), and a multicast trafficchannel (MTCH).

The physical channel includes several OFDM symbols in the time domainand several subcarriers in the frequency domain. One subframe includes aplurality of OFDM symbols in the time domain. An RB is a resourcesallocation unit, and includes a plurality of OFDM symbols and aplurality of subcarriers. Furthermore, each subframe may use specificsubcarriers of specific OFDM symbols (e.g., the first OFDM symbol) ofthe corresponding subframe for a physical downlink control channel(PDCCH), that is, an L1/L2 control channel. A Transmission Time Interval(TTI) is a unit time (e.g., slot, symbol) for subframe transmission.

Hereinafter, a new radio access technology (new RAT, NR) will bedescribed.

As more and more communication devices require more communicationcapacity, there is a need for improved mobile broadband communicationover existing radio access technology. Also, massive machine typecommunications (MTC), which provides various services by connecting manydevices and objects, is one of the major issues to be considered in thenext generation communication. In addition, communication system designconsidering reliability/latency sensitive service/UE is being discussed.The introduction of next generation radio access technology consideringenhanced mobile broadband communication (eMBB), massive MTC (mMTC),ultrareliable and low latency communication (URLLC) is discussed. Thisnew technology may be called new radio access technology (new RAT or NR)in the present disclosure for convenience.

FIG. 1 illustrates a system structure of a next generation radio accessnetwork (NG-RAN) to which NR is applied.

Referring to FIG. 1 , the NG-RAN may include a gNB and/or an eNB thatprovides user plane and control plane protocol termination to aterminal. FIG. 1 illustrates the case of including only gNBs. The gNBand the eNB are connected by an Xn interface. The gNB and the eNB areconnected to a 5G core network (5GC) via an NG interface. Morespecifically, the gNB and the eNB are connected to an access andmobility management function (AMF) via an NG-C interface and connectedto a user plane function (UPF) via an NG-U interface.

FIG. 2 illustrates a functional division between an NG-RAN and a 5GC.

Referring to FIG. 2 , the gNB may provide functions such as aninter-cell radio resource management (Inter Cell RRM), radio bearermanagement (RB control), connection mobility control, radio admissioncontrol, measurement configuration & provision, dynamic resourceallocation, and the like. The AMF may provide functions such as NASsecurity, idle state mobility handling, and so on. The UPF may providefunctions such as mobility anchoring. PDU processing, and the like. TheSMF may provide functions such as UE IP address assignment, PDU sessioncontrol, and so on.

FIG. 3 illustrates a frame structure applicable in NR.

Referring to FIG. 3 , a frame may be configured to have a length of 10millisecond (ms), and may include 10 sub-frames each having a length of1 ms.

One or a plurality of slots may be included in the SF according to asubcarrier spacing.

The following table 1 illustrates a subcarrier spacing configuration μ.

TABLE 1 μ Δf = 2^(μ) · 15[kHz] Cyclic prefix 0 15 Normal 1 30 Normal 260 Normal Extended 3 120 Normal 4 240 Normal

The following table 2 illustrates the number of slots in a frameN^(frame,μ) _(slot)), the number of slots in a subframe (N^(subframe,μ)_(slot)), the number of symbols in a slot (N^(slot) _(symb)), and thelike, according to subcarrier spacing configurations μ.

TABLE 2 μ N_(symb) ^(slot) N_(slot) ^(frame, μ) N_(slot) ^(subframe, μ)0 14 10 1 1 14 20 2 2 14 40 4 3 14 80 8 4 14 160 16

In FIG. 3 , μ=0, 1, and 2 are exemplified.

A physical downlink control channel (PDCCH) may include one or morecontrol channel elements (CCEs) as illustrated in the following table 3.

TABLE 3 Aggregation level Number of CCEs 1 1 2 2 4 4 8 8 16 16

That is, the PDCCH may be transmitted through a resource including 1, 2,4, 8, or 16 CCEs. Here, the CCE includes six resource element groups(REGs), and one REG includes one resource block in a frequency domainand one orthogonal frequency division multiplexing (OFDM) symbol in atime domain. A new unit called a control resource set (CORESET) may beintroduced in the NR. The UE may receive a PDCCH in the CORESET.

FIG. 4 illustrates CORESET.

Referring to FIG. 4 , the CORESET includes N^(CORSET) _(RB) number ofresource blocks in the frequency domain, and N^(CORESET) _(symb) ∈ {1,2, 3} number of symbols in the time domain. N^(CORESET) _(RB) andN^(CORESET) _(symb) may be provided by a base station via higher layersignaling. As illustrated in FIG. 4 , a plurality of CCEs (or REGs) maybe included in the CORESET.

The UE may attempt to detect a PDCCH in units of 1, 2, 4, 8, or 16 CCEsin the CORESET. One or a plurality of CCEs in which PDCCH detection maybe attempted may be referred to as PDCCH candidates.

A plurality of CORESETs may be configured for the terminal.

FIG. 5 is a diagram illustrating a difference between a related artcontrol region and the CORESET in NR.

Referring to FIG. 5 , a control region 800 in the related art wirelesscommunication system (e.g., LTE/LTE-A) is configured over the entiresystem band used by a base station (BS). All the terminals, excludingsome (e.g., eMTC/NB-IoT terminal) supporting only a narrow band, must beable to receive wireless signals of the entire system band of the BS inorder to properly receive/decode control information transmitted by theBS.

On the other hand, in NR. CORESET described above was introduced.CORESETs 801, 802, and 803 are radio resources for control informationto be received by the terminal and may use only a portion, rather thanthe entirety of the system bandwidth. The BS may allocate the CORESET toeach UE and may transmit control information through the allocatedCORESET. For example, in FIG. 5 , a first CORESET 801 may be allocatedto UE 1, a second CORESET 802 may be allocated to UE 2, and a thirdCORESET 803 may be allocated to UE 3. In the NR, the terminal mayreceive control information from the BS, without necessarily receivingthe entire system band.

The CORESET may include a UE-specific CORESET for transmittingUE-specific control information and a common CORESET for transmittingcontrol information common to all UEs.

Meanwhile, NR may require high reliability according to applications. Insuch a situation, a target block error rate (BLER) for downlink controlinformation (DCI) transmitted through a downlink control channel (e.g.,physical downlink control channel (PDCCH)) may remarkably decreasecompared to those of conventional technologies. As an example of amethod for satisfying requirement that requires high reliability,content included in DCI can be reduced and/or the amount of resourcesused for DCI transmission can be increased. Here, resources can includeat least one of resources in the time domain, resources in the frequencydomain, resources in the code domain and resources in the spatialdomain.

In NR, the following technologies/features can be applied.

<Self-Contained Subframe Structure>

FIG. 6 illustrates an example of a frame structure for new radio accesstechnology.

In NR, a structure in which a control channel and a data channel aretime-division-multiplexed within one TTI, as shown in FIG. 6 , can beconsidered as a frame structure in order to minimize latency.

In FIG. 6 , a shaded region represents a downlink control region and ablack region represents an uplink control region. The remaining regionmay be used for downlink (DL) data transmission or uplink (UL) datatransmission. This structure is characterized in that DL transmissionand UL transmission are sequentially performed within one subframe andthus DL data can be transmitted and UL ACK/NACK can be received withinthe subframe. Consequently, a time required from occurrence of a datatransmission error to data retransmission is reduced, thereby minimizinglatency in final data transmission.

In this data and control TDMed subframe structure, a time gap for a basestation and a terminal to switch from a transmission mode to a receptionmode or from the reception mode to the transmission mode may berequired. To this end, some OFDM symbols at a time when DL switches toUL may be set to a guard period (GP) in the self-contained subframestructure.

<Analog Beamforming #1>

Wavelengths are shortened in millimeter wave (mmW) and thus a largenumber of antenna elements can be installed in the same area. That is,the wavelength is 1 cm at 30 GHz and thus a total of 100 antennaelements can be installed in the form of a 2-dimensional array at aninterval of 0.5 lambda (wavelength) in a panel of 5×5 cm. Accordingly,it is possible to increase a beamforming (BF) gain using a large numberof antenna elements to increase coverage or improve throughput in mmW.

In this case, if a transceiver unit (TXRU) is provided to adjusttransmission power and phase per antenna element, independentbeamforming per frequency resource can be performed. However,installation of TXRUs for all of about 100 antenna elements decreaseseffectiveness in terms of cost. Accordingly, a method of mapping a largenumber of antenna elements to one TXRU and controlling a beam directionusing an analog phase shifter is considered. Such analog beamforming canform only one beam direction in all bands and thus cannot providefrequency selective beamforming.

Hybrid beamforming (BF) having a number B of TXRUs which is smaller thanQ antenna elements can be considered as an intermediate form of digitalBF and analog BF. In this case, the number of directions of beams whichcan be simultaneously transmitted are limited to B although it dependson a method of connecting the B TXRUs and the Q antenna elements.

<Analog Beamforming #2>

When a plurality of antennas is used in NR, hybrid beamforming which isa combination of digital beamforming and analog beamforming is emerging.Here, in analog beamforming (or RF beamforming) an RF end performsprecoding (or combining) and thus it is possible to achieve theperformance similar to digital beamforming while reducing the number ofRF chains and the number of D/A (or A/D) converters. For convenience,the hybrid beamforming structure may be represented by N TXRUs and Mphysical antennas. Then, the digital beamforming for the L data layersto be transmitted at the transmitting end may be represented by an N byL matrix, and the converted N digital signals are converted into analogsignals via TXRUs, and analog beamforming represented by an M by Nmatrix is applied.

FIG. 7 is an abstract schematic diagram illustrating hybrid beamformingfrom the viewpoint of TXRUs and physical antennas.

In FIG. 7 , the number of digital beams is L and the number of analogbeams is N. Further, in the NR system, by designing the base station tochange the analog beamforming in units of symbols, it is considered tosupport more efficient beamforming for a terminal located in a specificarea. Furthermore, when defining N TXRUs and M RF antennas as oneantenna panel in FIG. 7 , it is considered to introduce a plurality ofantenna panels to which independent hybrid beamforming is applicable inthe NR system.

When a base station uses a plurality of analog beams as described above,analog beams suitable to receive signals may be different for terminalsand thus a beam sweeping operation of sweeping a plurality of analogbeams to be applied by a base station per symbol in a specific subframe(SF) for at least a synchronization signal, system information andpaging such that all terminals can have reception opportunities isconsidered.

FIG. 8 illustrates the beam sweeping operation for a synchronizationsignal and system information in a downlink (DL) transmission procedure.

In FIG. 8 , physical resources (or a physical channel) in which systeminformation of the NR system is transmitted in a broadcasting manner isreferred to as a physical broadcast channel (xPBCH). Here, analog beamsbelonging to different antenna panels can be simultaneously transmittedwithin one symbol, and a method of introducing a beam reference signal(BRS) which is a reference signal (RS) to which a single analog beam(corresponding to a specific antenna panel) is applied in order tomeasure a channel per analog beam, as illustrated in FIG. 8 , is underdiscussion. The BRS can be defined for a plurality of antenna ports, andeach antenna port of the BRS can correspond to a single analog beam.Here, all analog beams in an analog beam group are applied to thesynchronization signal or xPBCH and then the synchronization signal orxPBCH is transmitted such that an arbitrary terminal can successivelyreceive the synchronization signal or xPBCH.

FIG. 9 shows examples of 5G usage scenarios to which the technicalfeatures of the present disclosure can be applied. The 5G usagescenarios shown in FIG. 9 are only exemplary, and the technical featuresof the present disclosure can be applied to other 5G usage scenarioswhich are not shown in FIG. 9 .

Referring to FIG. 9 , the three main requirements areas of 5G include(1) enhanced mobile broadband (eMBB) domain, (2) massive machine typecommunication (mMTC) area, and (3) ultra-reliable and low latencycommunications (URLLC) area. Some use cases may require multiple areasfor optimization and, other use cases may only focus on only one keyperformance indicator (KPI). 5G is to support these various use cases ina flexible and reliable way.

eMBB focuses on across-the-board enhancements to the data rate, latency,user density, capacity and coverage of mobile broadband access. The eMBBaims ˜10 Gbps of throughput. eMBB far surpasses basic mobile Internetaccess and covers rich interactive work and media and entertainmentapplications in cloud and/or augmented reality. Data is one of the keydrivers of 5G and may not be able to see dedicated voice services forthe first time in the 5G era. In 5G, the voice is expected to beprocessed as an application simply using the data connection provided bythe communication system. The main reason for the increased volume oftraffic is an increase in the size of the content and an increase in thenumber of applications requiring high data rates. Streaming services(audio and video), interactive video and mobile Internet connectivitywill become more common as more devices connect to the Internet. Many ofthese applications require always-on connectivity to push real-timeinformation and notifications to the user. Cloud storage andapplications are growing rapidly in mobile communication platforms,which can be applied to both work and entertainment. Cloud storage is aspecial use case that drives growth of uplink data rate. 5G is also usedfor remote tasks on the cloud and requires much lower end-to-end delayto maintain a good user experience when the tactile interface is used.In entertainment, for example, cloud games and video streaming areanother key factor that increases the demand for mobile broadbandcapabilities. Entertainment is essential in smartphones and tabletsanywhere, including high mobility environments such as trains, cars andairplanes. Another use case is augmented reality and informationretrieval for entertainment. Here, augmented reality requires very lowlatency and instantaneous data amount.

mMTC is designed to enable communication between devices that arelow-cost, massive in number and battery-driven, intended to supportapplications such as smart metering, logistics, and field and bodysensors. mMTC aims ˜10 years on battery and/or ˜1 million devices/km2.mMTC allows seamless integration of embedded sensors in all areas and isone of the most widely used 5G applications. Potentially by 2020, IoTdevices are expected to reach 20.4 billion. Industrial IoT is one of theareas where 5G plays a key role in enabling smart cities, assettracking, smart utilities, agriculture and security infrastructures.

URLLC will make it possible for devices and machines to communicate withultra-reliability, very low latency and high availability, making itideal for vehicular communication, industrial control, factoryautomation, remote surgery, smart grids and public safety applications.URLLC aims ˜1 ms of latency. URLLC includes new services that willchange the industry through links with ultra-reliability/low latency,such as remote control of key infrastructure and self-driving vehicles.The level of reliability and latency is essential for smart gridcontrol, industrial automation, robotics, drones control andcoordination.

Next, a plurality of use cases included in the triangle of FIG. 9 willbe described in more detail.

5G can complement fiber-to-the-home (FTTH) and cable-based broadband (orDOCSIS) as a means of delivering streams rated from hundreds of megabitsper second to gigabits per second. This high speed can be required todeliver TVs with resolutions of 4K or more (6K, 8K and above) as well asvirtual reality (VR) and augmented reality (AR). VR and AR applicationsinclude mostly immersive sporting events. Certain applications mayrequire special network settings. For example, in the case of a VR game,a game company may need to integrate a core server with an edge networkserver of a network operator to minimize delay.

Automotive is expected to become an important new driver for 5G, withmany use cases for mobile communications to vehicles. For example,entertainment for passengers demands high capacity and high mobilebroadband at the same time. This is because future users will continueto expect high-quality connections regardless of their location andspeed. Another use case in the automotive sector is an augmented realitydashboard. The driver can identify an object in the dark on top of whatis being viewed through the front window through the augmented realitydashboard. The augmented reality dashboard displays information thatwill inform the driver about the object's distance and movement. In thefuture, the wireless module enables communication between vehicles,information exchange between the vehicle and the supportinginfrastructure, and information exchange between the vehicle and otherconnected devices (e.g. devices accompanied by a pedestrian). The safetysystem allows the driver to guide the alternative course of action sothat he can drive more safely, thereby reducing the risk of accidents.The next step will be a remotely controlled vehicle or self-drivingvehicle. This requires a very reliable and very fast communicationbetween different self-driving vehicles and between vehicles andinfrastructure. In the future, a self-driving vehicle will perform alldriving activities, and the driver will focus only on traffic that thevehicle itself cannot identify. The technical requirements ofself-driving vehicles require ultra-low latency and high-speedreliability to increase traffic safety to a level not achievable byhumans.

Smart cities and smart homes, which are referred to as smart societies,will be embedded in high density wireless sensor networks. Thedistributed network of intelligent sensors will identify conditions forcost and energy-efficient maintenance of a city or house. A similarsetting can be performed for each home. Temperature sensors, windows andheating controllers, burglar alarms and appliances are all wirelesslyconnected. Many of these sensors typically require low data rate, lowpower and low cost. However, for example, real-time HD video may berequired for certain types of devices for monitoring.

The consumption and distribution of energy, including heat or gas, ishighly dispersed, requiring automated control of distributed sensornetworks. The smart grid interconnects these sensors using digitalinformation and communication technologies to collect and act oninformation. This information can include supplier and consumerbehavior, allowing the smart grid to improve the distribution of fuel,such as electricity, in terms of efficiency, reliability, economy,production sustainability, and automated methods. The smart grid can beviewed as another sensor network with low latency.

The health sector has many applications that can benefit from mobilecommunications. Communication systems can support telemedicine toprovide clinical care in remote locations. This can help to reducebarriers to distance and improve access to health services that are notcontinuously available in distant rural areas. It is also used to savelives in critical care and emergency situations. Mobile communicationbased wireless sensor networks can provide remote monitoring and sensorsfor parameters such as heart rate and blood pressure.

Wireless and mobile communications are becoming increasingly importantin industrial applications. Wiring costs are high for installation andmaintenance. Thus, the possibility of replacing a cable with a wirelesslink that can be reconfigured is an attractive opportunity in manyindustries. However, achieving this requires that wireless connectionsoperate with similar delay, reliability, and capacity as cables and thattheir management is simplified. Low latency and very low errorprobabilities are new requirements that need to be connected to 5G.

Logistics and freight tracking are important use cases of mobilecommunications that enable tracking of inventory and packages anywhereusing location based information systems. Use cases of logistics andfreight tracking typically require low data rates, but require a largerange and reliable location information.

Hereinafter, a discussion related to power saving will be described.

The UE's battery life is a factor of the user experience that influencesthe adoption of 5G handsets and/or services. Power efficiency for 5G NRUEs is not worse than at least LTE, and a study of UE power consumptionmay be provided in order to identify and apply techniques and designsfor improvement.

ITU-R defines energy efficiency as one of the minimum technicalperformance requirements of IMT-2020. According to the ITU-R report,e.g. the minimum requirements related to the technical performance ofthe IMT-2020 air interface, the energy efficiency of a device can berelated to support for two aspects: a) efficient data transmission inthe loaded case, b) low energy consumption when there is no data.Efficient data transmission in the loaded case is demonstrated byaverage spectral efficiency. In the absence of data, low energyconsumption can be estimated by the sleep rate.

Since the NR system can support high-speed data transmission, it isexpected that user data will burst and be serviced for a very shortperiod of time. One efficient UE power saving mechanism is to triggerthe UE for network access from the power efficiency mode. Unless thereis information about network access through the UE power savingframework, the UE maintains a power efficiency mode such as amicro-sleep or OFF period within a long DRX period. Instead, when thereis no traffic to be transmitted, the network may support the UE toswitch from the network access mode to the power saving mode (e.g.,dynamic UE switching to sleep with a network support signal).

In addition to minimizing power consumption with a newwake-up/go-to-sleep mechanism, it may be provided to reduce powerconsumption during network access in the RRC_CONNECTED mode. In LTE,more than half of the power consumption of the UE occurs in theconnected mode. Power saving techniques should focus on minimizing themain factors of power consumption during network access, includingprocessing of aggregated bandwidth, dynamic number of RF chains anddynamic transmission/reception time, and dynamic switching to powerefficiency mode. In most cases of LTE field TTI, there is no data orthere is little data, so a power saving scheme for dynamic adaptation toother data arrivals should be studied in the RRC-CONNECTED mode. Dynamicadaptation to traffic of various dimensions such as a carrier, anantenna, beamforming, and bandwidth can also be studied. Further, it isnecessary to consider how to enhance the switching between the networkconnection mode and the power saving mode. Both network-assisted andUE-assisted approaches should be considered for UE power savingmechanisms.

The UE also consumes a lot of power for RRM measurement. In particular,the UE must turn on the power before the DRX ON period for tracking thechannel to prepare for RRM measurement. Some of the RRM measurement isnot essential, but consumes a lot of UE power. For example, low mobilityUEs do not need to be measured as frequently as high mobility UEs. Thenetwork may provide signaling to reduce power consumption for RRMmeasurement, which is unnecessary for the UE. Additional UE support, forexample, UE state information, etc., is also useful for enabling thenetwork to reduce UE power consumption for RRM measurement.

Accordingly, there is a need for research to identify the feasibilityand advantages of a technology that enables the implementation of a UEcapable of operating while reducing power consumption.

Hereinafter, UE power saving schemes will be described.

For example, the UE power saving techniques may consider a power savingsignal/channel/procedure for triggering UE adaptation to traffic andpower consumption characteristics, adaptation to frequency changes,adaptation to time changes, adaptation to the antenna, adaptation to theDRX configuration, adaptation to UE processing capabilities, adaptationto obtain PDCCH monitoring/decoding reduction, UE power consumptionadaptation, and a reduction in power consumption in RRM measurement.

Regarding adaptation to the DRX configuration, a downlink shared channel(DL-SCH) featuring support for UE discontinuous reception (DRX) forenabling UE power saving. PCH featuring support for UE DRX enabling UEpower saving (here, the DRX cycle may be indicated to the UE by thenetwork), and the like may be considered.

Regarding adaptation to the UE processing capability, the followingtechniques may be considered. When requested by the network, the UEreports at least its static UE radio access capability. The gNB mayrequest the ability of the UE to report based on band information. Whenallowed by the network, a temporary capability limit request may be sentby the UE to signal the limited availability of some capabilities (e.g.,due to hardware sharing, interference, or overheating) to the gNB.Thereafter, the gNB can confirm or reject the request. Temporarycapability limitations must be transparent to 5GC. That is, only staticfunctions are stored in 5GC.

Regarding adaptation to obtain PDCCH monitoring/decoding reduction, thefollowing techniques may be considered. The UE monitors the PDCCHcandidate set at a monitoring occasion configured in one or moreCORESETs configured according to a corresponding search spaceconfiguration. CORESET includes a set of PRBs having a time interval of1 to 3 OFDM symbols. Resource units REG and CCE are defined in CORESET,and each CCE includes a set of REGs. The control channel is formed by aset of CCEs. Different code rates for the control channel areimplemented by aggregating different numbers of CCEs. Interleaved andnon-interleaved CCE-REG mapping is supported in CORESET.

Regarding the power saving signal/channel/procedure for triggering UEpower consumption adaptation, the following technique may be considered.In order to enable reasonable UE battery consumption when carrieraggregation (CA) is configured, an activation/deactivation mechanism ofcells is supported. When one cell is deactivated, the UE does not needto receive a corresponding PDCCH or PDSCH, cannot perform acorresponding UL transmission, and does not need to perform a channelquality indicator (CQI) measurement. Conversely, when one cell isactivated, the UE must receive the PDCH and PDCCH (when the UE isconfigured to monitor the PDCCH from this SCell), and is expected to beable to perform CQI measurement. The NG-RAN prevents the SCell of thesecondary PUCCH group (the group of SCells in which PUCCH signaling isassociated with the PUCCH of the PUCCH SCell) from being activated whilethe PUCCH SCell (secondary cell composed of PUCCH) is deactivated. TheNG-RAN causes the SCell mapped to the PUCCH SCell to be deactivatedbefore the PUCCH SCell is changed or removed.

When reconfiguring without mobility control information, the SCell addedto the set of serving cells is initially deactivated, and the (unchangedor reconfigured) SCells remaining in the set of serving cells do notchange the activate state (e.g. active or inactive).

SCells are deactivated when reconfiguring with mobility controlinformation (e.g., handover).

In order to enable reasonable battery consumption when BA (bandwidthadaptation) is configured, only one UL BWP and one DL BWP or only oneDL/UL BWP pair for each UL carrier may be activated at once in theactive serving cell, and all other BWPs configured in the UE aredeactivated. In deactivated BWPs, the UE does not monitor the PDCCH anddoes not transmit on the PUCCH, PRACH and UL-SCH.

For BA, the UE's reception and transmission bandwidth need not be aswide as the cell's bandwidth and can be adjusted: the width can becommanded to change (e.g. shrink during periods of low activity to savepower), the position in the frequency domain can be moved (e.g. toincrease scheduling flexibility), and the subcarrier spacing can beordered to change (e.g., to allow different services). A subset of thetotal cell bandwidth of a cell is referred to as a bandwidth part (BWP),the BA is obtained by configuring the BWP(s) to the UE and knowing thatit is currently active among the BWPs configured to the UE. When the BAis configured, the UE only needs to monitor the PDCCH on one active BWP.That is, there is no need to monitor the PDCCH on the entire DLfrequency of the cell. The BWP inactive timer (independent of the DRXinactive timer described above) is used to convert the active BWP to thedefault BWP: the timer is restarted when the PDCCH decoding succeeds,switching to the default BWP occurs when the timer expires.

FIG. 10 illustrates a scenario in which three different bandwidth partsare configured.

FIG. 10 shows an example in which BWP₁. BWP₂, and BWP₃ are configured ontime-frequency resources. BWP₁ has a width of 40 MHz and a subcarrierspacing of 15 kHz, BWP₂ has a width of 10 MHz and a subcarrier spacingof 15 kHz, and BWP₃ may have a width of 20 MHz and a subcarrier spacingof 60 kHz. In other words, each of the bandwidth parts may havedifferent widths and/or different subcarrier spacings.

Regarding the power consumption reduction in RRM measurement, thefollowing technique may be considered. When two measurement types arepossible, the RRM configuration may include the beam measurementinformation related to the SSB(s) (for layer 3 mobility) and theCSI-RS(s) for the reported cell(s). In addition, when CA is configured,the RRM configuration may include a list of best cells on each frequencyfor which measurement information is available. In addition, the RRMmeasurement information may include beam measurement for listed cellsbelonging to the target gNB.

The following techniques can be used in various wireless access systemssuch as CDMA, FDMA, TDMA, OFDMA. SC-FDMA, and the like. CDMA may beimplemented with a radio technology such as Universal Terrestrial RadioAccess (UTRA) or CDMA2000. TDMA may be implemented with a radiotechnology such as Global System for Mobile communications (GSM)/GeneralPacket Radio Service (GPRS)/Enhanced Data Rates for GSM Evolution(EDGE). OFDMA may be implemented with a wireless technology such as IEEE802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and Evolved UTRA(E-UTRA). UTRA is a part of Universal Mobile Telecommunications System(UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution(LTE) is a part of Evolved UMTS (E-UMTS) using E-UTRA, and Advanced(LTE-A)/LTE-A pro is an evolved version of 3GPP LTE. 3GPP New Radio orNew Radio Access Technology (NR) is an evolved version of 3GPPLTE/LTE-A/LTE-A pro.

For clarity, the description is based on a 3GPP communication system(e.g., LTE-A, NR), but the technical idea of the present specificationis not limited thereto. LTE refers to technology after 3GPP TS 36.xxxRelease 8. In detail, LTE technology after 3GPP TS 36.xxx Release 10 isreferred to as LTE-A, and LTE technology after 3GPP TS 36.xxx Release 13is referred to as LTE-A pro. 3GPP NR refers to the technology after TS38.xxx Release 15. LTE/NR may be referred to as a 3GPP system. “xxx”means standard document detail number. LTE/NR may be collectivelyreferred to as a 3GPP system. Background art, terms, abbreviations, andthe like used in the description of the present specification may referto matters described in standard documents published before the presentspecification.

Hereinafter, the proposal of the present specification will be describedin more detail.

Additional advantages, objects and features of the present specificationwill be partially described in the following description, it will beapparent to one of ordinary skill in the art or will be able to learn inpart from the practice of this specification upon review of thefollowing. Objects and other advantages of the present specification canbe realized and achieved by the accompanying drawings, as well as thestructures particularly pointed out in the claims and claims of thepresent specification.

In the NR system, each serving cell may be configured with a pluralityof (e.g., maximum 4) bandwidth parts (BWP), and the dormant state in theNR system is considering the operation in units of BWP. Accordingly, adormancy operation for each cell and/or BWP needs to be defined.

Hereinafter, embodiments of the present specification will be describedwith reference to the drawings. The following drawings were prepared toexplain a specific example of the present specification. Since the namesof specific devices described in the drawings or the names of specificsignals/messages/fields are presented by way of example, the technicalfeatures of the present specification are not limited to the specificnames used in the following drawings.

FIG. 11 is a flowchart of a method of receiving dormant BWPconfiguration information according to an embodiment of the presentspecification.

According to FIG. 11 , the UE may receive dormant BWP configurationinformation from a base station (S1410). Here, the dormant BWPconfiguration information may be information about a DL BWP used asdormant BWP among at least one DL BWP configured for the UE.

As an example, dormant BWP configuration information received by the UEmay be, for example, dormantBWP-Id. Here, the dormant BWP configurationinformation may include identification information of the DL BWP used asthe dormant BWP. In this connection, the identification information ofthe dormant BWP may be different from the identification information ofthe default BWP. (In other words, the dormant BWP may be a BWP differentfrom the default BWP.)

In addition, as an example, dormant BWP configuration informationreceived by the UE may be transmitted through higher layer signaling(e.g., RRC signaling).

The UE may receive DCI notifying activation of the dormant BWP from thebase station (S1420).

As an example, DCI may include, for example, a bandwidth part indicatorfield. Here, as an example, the bandwidth part indication field includedin the DCI may indicate an active DL BWP among the configured DL BWPs.Since the dormant BWP corresponds to a type of DL BWP, active dormantBWP may also be indicated from the bandwidth part indication field.

In addition, as an example, DCI may correspond to, for example, DCIformat 1_1 or DCI format 1_2, and DCI may be transmitted through L1signaling.

The UE may stop monitoring a PDCCH on the dormant BWP (S1430). Here, theBWP inactivity timer is not used based on the activation of the dormantBWP, and the BWP inactivity timer may be a timer for a transition to adefault BWP.

As an example, the UE may receive information about a value of the BWPinactivity timer from a base station. In this connection, theinformation received by the UE may be, for example, bwp-InactivityTimer.

Herein, for example, when the duration for the value of the BWPinactivity timer elapses, the UE may fall back to the default BWP. Inother words, when the BWP inactivity timer expires, the UE maytransition from the current BWP to the default BWP.

For example, when the network releases configuration information for theBWP inactivity timer, the UE may stop the timer without a transition tothe default BWP.

In this embodiment, as an example, the UE may continue to performchannel state information (CSI) measurement on the dormant BWP. Aspecific example thereof will be described later (or is as describedabove), and thus repeated description will be omitted.

For example, the default BWP may be a BWP to which the UE transitionswhen the BWP inactivity timer expires. A specific example thereof willbe described later (or is as described above), and thus repeateddescription will be omitted.

For example, the dormant BWP may be BWP different from the default BWP.Here, on the basis that the dormant BWP is not the default BWP, the BWPinactivity timer may not be used. A specific example thereof will bedescribed later (or is as described above), and thus repeateddescription will be omitted.

For example, the dormant BWP may be activated, and based on running ofthe BWP inactivity timer, the UE may stop the BWP inactivity timer. Aspecific example thereof will be described later (or is as describedabove), and thus repeated description will be omitted.

For example, the UE may stop the BWP inactivity timer without atransition to the default BWP based on a release of the BWP inactivitytimer. A specific example thereof will be described later (or is asdescribed above), and thus repeated description will be omitted.

For example, the at least one DL BWP may be a DL BWP for a secondarycell (SCell). Here, the at least one BWP may include the dormant BWP.Here, the at least one BWP may include the default BWP. A specificexample thereof will be described later (or is as described above), andthus repeated description will be omitted.

Hereinafter, embodiments of the present specification will be describedin more detail.

In the LTE system, a dormant state is defined to quickly performactivation/deactivation of a secondary cell (hereinafter, SCell). When aspecific SCell is configured to the dormant state, the UE may notperform PDCCH monitoring for the cell. Thereafter, in order to quicklyactivate the corresponding SCell, it is defined to monitor the channelcondition and link status of the corresponding cell by performingmeasurement, report, etc. in the dormant state. For example, when aspecific SCell is configured to the dormant state, the UE does notperform PDCCH monitoring, but may perform measurement and reporting forCSI/RRM.

In the NR system, each serving cell may be configured with a pluralityof (e.g., maximum 4) bandwidth parts (BWP), and the dormant state in theNR system is considering the operation in units of BWP. For example, adormancy operation for each cell and BWP may be defined through thefollowing methods.

Method 1) State Change

The network may indicate a transition to a dormant state for a specificBWP, and the UE may not perform a part or all of the PDCCH monitoringconfigured in the BWP indicated to transition to the dormant state.

Method 2) Dormant BWP

The network may designate a specific BWP as a dormant BWP. For example,the BWP having a bandwidth of 0 may be configured, the minimum PDCCHmonitoring may be indicated through the BWP configuration, or the PDCCHmonitoring may not be indicated (by not indicating the SS setconfiguration).

In summary, in the NR system, a plurality of BWPs may be configured inone cell, and this may also be the case on the SCell. In other words, aplurality of BWPs may be configured in the SCell.

Herein, some of the plurality of BWPs in the SCell may be configured asdormant BWPs, and others may be configured as default BWPs. In thisconnection, on the dormant BWP, as described above, the UE may stopmonitoring the PDCCH. In contrast, on the dormant BWP, when configured,the UE may continue to perform CSI measurement, automatic gain control(AGC), and/or beam management.

Additionally, the NR system considers a transition between a normalstate and a dormant state through L1 signaling (e.g., using DCI) forfaster SCell activation/deactivation. For example, the dormancyoperation of a specific cell may be activated/deactivated through thefollowing methods.

Method 1) Introduction of Special DCI

A special DCI for indicating dormancy behavior of each SCell may bedefined. For example, the UE may be indicated to monitor for a specialDCI in the PCell, and the network may determine whether each SCell isdormancy through the special DCI. The dormancy behavior of the SCell maybe defined using the above method 1 or 2, etc.

Method 2) Enhancement of BWP Indication Field in DCI

It is possible to extend a BWP indication field of the existing DCI toperform the BWP indication of the corresponding cell and/or a specificSCell(s) (that is, performing a cross-carrier indication for BWP in theexisting BWP indication field).

Method 3) BWP Level Cross-Carrier Scheduling

The existing cross-carrier scheduling performs inter-carrier pairing insuch a way that each cell indicates whether the corresponding cell is ascheduling/scheduled cell, and in the case of a scheduled cell, eachcell indicates a scheduling cell of the corresponding cell. In order todefine dormancy behavior for the SCell, a method of indicating whethercross-carrier scheduling for each BWP may be considered. For example, ineach BWP configuration of the SCell, a scheduling cell that may beindicated to change a state, etc. when the corresponding BWP performsdormancy behavior may be designated. Alternatively, when a dormant BWPis designated, a scheduling cell indicating the dormancy behavior of thecorresponding BWP in the corresponding BWP configuration may bedesignated.

In summary, in the NR system, a method of using DCI for dormantactivation/deactivation operation may be provided. In this connection, adormant BWP among a plurality of BWPs on the SCell may beactivated/deactivated through DCI.

As stated above, various methods are being discussed to implement SCellfast activation/deactivation and dormancy behavior in NR. When the abovemethods are used, additional considerations may be as follows.

-   -   Issue 1) Default BWP triggered by BWP inactivity timer    -   Issue 2) Scheduling information within a DCI triggering dormancy        behavior    -   Issue 3) HARQ feedback of a DCI triggering dormancy behavior

Each issue and solution are discussed below.

In the present specification, D-BWP may mean a BWP performing dormancybehavior, and N-BWP may mean a BWP performing an existing BWP operationas a normal BWP. In addition, in the present disclosure, dormantbehavior in a certain BWP does not receive PDCCH in the correspondingBWP or receives it at a longer period than normal behavior, or does notreceive PDSCH/PUSCH scheduling for the corresponding BWP, or it may meanthat it is received in a longer period than normal behavior. Similarly,the dormant BWP may mean not receiving PDCCH in the corresponding BWP orreceiving it at a longer period than normal BWP, or receiving noPDSCH/PUSCH scheduling for the corresponding BWP or receiving it at alonger period than normal BWP.

FIG. 12 illustrates dormant behavior.

As exemplified in FIG. 12(A), the UE may not perform PDCCH monitoringthereafter when receiving a dormant state indication while performingPDCCH monitoring in the first BWP. Alternatively, as exemplified in FIG.12(B), while performing PDCCH monitoring in a first period in the secondBWP, when a dormant state is indicated, thereafter, PDCCH monitoring maybe performed in a second period. In this connection, the second periodmay be longer than the first period.

<Default BWP Triggered by BWP Inactivity Timer>

FIG. 13 illustrates an example of the BWP operation of the UE.

In the BWP operation of Rel-15, a BWP inactivity timer was introduced toprevent the case of configuring different active BWPs due tomisunderstanding between the UE and the network. When the UE does notreceive the PDCCH for more than a specific time (specified by the timer)in the active BWP, it may move to the default BWP indicated in advanceby the network, and PDCCH monitoring in the default BWP may be performedaccording to the configured PDCCH monitoring configuration (e.g.,CORESET. SS set configuration) for the default BWP. This operation isexemplified in FIG. 13 .

When such a default BWP operation and dormancy behavior are performedtogether, an operation contrary to each purpose may be performed. Forexample, the network may indicate a specific SCell to move to D-BWP forpower saving of the UE, or to change the current BWP to a dormant state.However, the UE that has configured for a BWP inactivity timer may moveto the default BWP after a certain period of time to perform PDCCHmonitoring.

A simple way to solve this is to consider a method of configuring thedefault BWP to D-BWP. However, in this case, an additional method isrequired to solve misunderstanding between the network and the UE, whichis the original purpose of the default BWP.

In this regard, the present specification proposes the following methodto apply dormancy behavior and BWP inactivity timer together.

When the network indicates the movement to D-BWP, or the current activeBWP is switched to the dormant state, the UE ignores the presentlyconfigured BWP inactivity timer, or the inactivity timer may be reset asa predefined value or a value indicated by the network (for dormancybehavior).

In summary, according to an embodiment of the present specification, theactive dormant BWP and the default BWP may be different BWPs. Inaddition, when the active dormant BWP is not the default BWP, the BWPinactivity timer may not be used based on the activation of the dormantBWP. In other words, when the active dormant BWP is not the default BWP(even when it is desirable for the UE to be in the dormant BWP for powersaving, to prevent the inefficiency of forcibly transitioning to thedefault BWP by the BWP inactivity timer), based on the activation of thedormant BWP, the BWP inactivity timer, which is a timer for a transitionto a default BWP, may not be used.

In addition, as described above, the dormant BWP and the default BWP maybe BWPs on the SCell. From this viewpoint, the above description is onceagain explained as follows. When the active DL BWP indicated (orprovided) as dormant BWP for a UE on an activated SCell is not a defaultBWP for the UE on the activated SCell, the BWP inactivity timer may notbe used for a transition from the active DL BWP indicated (or provided)as the dormant BWP to the default DL BWP on the activated SCell.

For example, the network may configure an appropriate dormancy sectionin consideration of the UE's traffic situation, etc., and may indicatethe UE (m advance) of the corresponding value. Thereafter, when the UEis indicated to move to the D-BWP or is indicated to switch the currentactive BWP to the dormant state, the UE may configure the valueindicated by the network as the BWP inactivity timer value. In addition,the inactivity timer for dormancy behavior indicated by the network mayoperate independently of the existing BWP inactivity timer. For example,the UE indicated for the dormancy behavior may turn off the existing BWPinactivity timer and operate the inactivity timer for the dormancybehavior. Thereafter, when the BWP inactivity timer is terminated or theUE is indicated to move to the N-BWP (or switching to the normal state),the dormancy behavior may be terminated.

FIG. 14 illustrates another example of the BWP operation of the UE.

In addition, when the dormancy behavior is terminated by the inactivitytimer for the dormancy behavior, the UE may move to the default BWP ofthe corresponding cell or switch to a normal state. Alternatively, whenthe network terminates dormancy behavior by the inactivity timer, the UEmay designate and indicate the BWP to move. This operation isillustrated in FIG. 14 .

<Scheduling Information within a DCI Triggering Dormancy Behavior>

When the movement between D-BWP/N-BWP is indicated by DCI, and thecorresponding DCI is a general scheduling DCI, a problem may occur whenit is not clear whether the scheduling information in the DCI operates.For example, when performing an operation for PDSCH scheduling in DCIindicating movement to D-BWP, additional operation may be requireddepending on whether the reception of the corresponding PDSCH issuccessful. This may mean that the PDCCH/PDSCH transmission/receptionoperation may continue even in the D-BWP. In order to solve such aproblem, the present disclosure proposes the following method.

Case 1) When PDSCH scheduling information exists in DCI indicatingdormancy behavior for a specific cell (or DCI indicating switching todormant BWP)

As described above, since PDSCH transmission/reception in D-BWP maycause additional PDCCH/PDSCH transmission/reception, an operationcontrary to the purpose of dormant BWP may be performed. Accordingly,PDSCH scheduling information for D-BWP included in DCI indicatingdormancy behavior may be ignored. In addition, the decoding performanceof the UE may be improved by transmitting a known bit (sequence) to thecorresponding field. For this purpose, known bit information for (thefield related to PDSCH scheduling) may be indicated by the network orthrough previous definition.

Case 2) When PDSCH scheduling (or UL scheduling) information exists inDCI (or DCI indicating switching from dormant BWP to normal BWP)indicating the switching from dormancy behavior to normal behavior

In the case of case 2, since PDSCH scheduling information (or ULscheduling information) may reduce PDCCH transmission in N-BWP or in anormal state, it may be desirable to apply PDSCH scheduling information.However, case 2 may determine whether PDSCH scheduling information (orUL scheduling information) is applied while being limited to the case ofUL/DL scheduling related information in the N-BWP to which thecorresponding PDSCH scheduling information (or UL schedulinginformation) is switched or PDSCH (or UL transmission) relatedinformation in the normal state. For example, when a field indicatingdormancy behavior for a specific SCell(s) is added to DCI for schedulingPDSCH of PCell, the PDSCH scheduling information of the correspondingDCI may also mean PDSCH-related information in the PCell.

<HARQ Feedback of a DCI Triggering Dormancy Behavior>

Since the dormancy behavior may limit the PDCCH/PDSCHtransmission/reception operation in the indicated cell as much aspossible (according to the definition), subsequent operations of thenetwork and the UE may be greatly affected by missing/false alarms, etc.In order to solve this problem, a method of improving decodingperformance may be applied or an additional identification operation forthe dormancy behavior indication may be required. In order to solve thisproblem, the present specification proposes to perform ACK/NACK feedbackfor the movement to the D-BWP or the switching to the dormant state.

To this end, the following method may be considered. The options belowmay be implemented alone or in combination. In the following, when DCIis configured only with an indication of dormancy behavior (since the UEmay not determine whether NACK is present), the following proposal maybe interpreted as transmitting ACK signaling. Alternatively, when DCIindicating dormancy behavior also includes PDSCH scheduling, it may meanthat ACK/NACK (uplink transmission in case of uplink scheduling) for thecorresponding PDSCH has received a command for dormancy behavior. (Inother words, since both ACK and NACK may mean that DCI reception isnormally received, both ACK/NACK may mean that an indication fordormancy behavior has been received.)

Case 1) Dormancy Command+UL/DL Scheduling

DCI indicating dormancy behavior may include UL/DL schedulinginformation, and scheduled UL transmission and ACK/NACK for DL may meanthat DCI including dormancy behavior has been properly received, andthus the UE and the network may assume that the indicated dormancybehavior is performed. (Herein, since NACK means NACK for PDSCHreception, NACK may also mean that an indication for dormancy behaviorhas been received.)

Case 1-1) When the target of UL/DL scheduling is dormancy BWP (ordormant state)

It may be assumed that the UE may perform dormancy behavior aftertermination of the scheduled UL/DL scheduling, and it may be assumedthat the ACK/NACK resource (or UL resource) for the correspondingscheduling in D-BWP (or dormant state) follows the existing ACK/NACKresource determination method and UL transmission method. Afterterminating the corresponding UU/DL transmission/reception, the UE mayperform dormancy behavior, and may assume that there is no schedulingthereafter or ignore it.

Case 1-2) When the target of UL/DL scheduling is scheduling cell/BWP (ornormal state)

In this case, ACK/NACK or UL transmission in the scheduling cell/BWP (ornormal state) may mean that the dormancy command is normally received,and the UE may perform dormancy behavior.

Case 2) dormancy command+non-scheduling/fake-scheduling

Case 2 is a case in which dormancy behavior is indicated by DCI (or DCIthat may assume the scheduling information field as a dummy) in whichonly the command for dormancy behavior is valid without UL/DL schedulinginformation. In this case, because there is no associated UL/DLtransmission/reception, feedback information about DCI (when DCI is notreceived, the UE does not know whether DCI is transmitted, so it mayactually mean ACK transmission) may be transmitted. In this case,feedback for the dormancy command is transmitted in the dormancy BWP (ordormant state), and the feedback resource is indicated together by DCIfor transmitting the dormancy command, or feedback may be performedthrough a predefined feedback resource.

The effects that can be obtained through a specific example of thepresent specification are not limited to the effects listed above. Forexample, there may be various technical effects that a person havingordinary skill in the related art can understand or derive from thepresent specification. Accordingly, specific effects of the presentspecification are not limited to those explicitly described in thepresent specification, and may include various effects that can beunderstood or derived from the technical features of the presentspecification.

When the contents of the above-described embodiments are described froma different perspective, they may be as follows.

The following drawings were prepared to explain a specific example ofthe present specification. Since the names of specific devices describedin the drawings or the names of specific signals/messages/fields arepresented by way of example, the technical features of the presentspecification are not limited to the specific names used in thefollowing drawings.

FIG. 15 is a flowchart of a method of receiving dormant BWPconfiguration information from the viewpoint of a UE according to anembodiment of the present specification.

According to FIG. 15 , the UE may receive dormant BWP configurationinformation from a base station (S1510). Here, the dormant BWPconfiguration information may be information about a DL BWP used asdormant BWP among at least one DL BWP configured for the UE. Sincespecific examples of the above embodiments are the same as describedabove, in order to avoid unnecessary repetition, descriptions ofoverlapping contents will be omitted.

The UE may receive downlink control information (DCI) notifyingactivation of the dormant BWP from the base station (S1520). Sincespecific examples of the above embodiments are the same as describedabove, in order to avoid unnecessary repetition, descriptions ofoverlapping contents will be omitted.

The UE may stop monitoring a physical downlink control channel (PDCCH)on the dormant BWP (S1530). Here, the BWP inactivity timer is not usedbased on the activation of the dormant BWP, and the BWP inactivity timermay be a timer for a transition to a default BWP. Since specificexamples of the above embodiments are the same as described above, inorder to avoid unnecessary repetition, descriptions of overlappingcontents will be omitted.

FIG. 16 is a block diagram of an example of an apparatus for receivingdormant BWP configuration information from the viewpoint of a UEaccording to an embodiment of the present specification.

According to FIG. 16 , the processor 1600 may include a configurationinformation receiver 1610, a downlink control information (DCI) receiver1620, and a monitoring stopper 1630. Here, the processor 1600 maycorrespond to the processor to be described later (or described above).

The configuration information receiver 1610 may be configured to controlthe transceiver to receive dormant BWP configuration information from abase station. Here, the dormant BWP configuration information may beinformation about a DL BWP used as dormant BWP among at least one DL BWPconfigured for the UE. Since specific examples of the above embodimentsare the same as described above, in order to avoid unnecessaryrepetition, descriptions of overlapping contents will be omitted.

The DCI receiver 1620 may be configured to control the transceiver toreceive DCI notifying activation of the dormant BWP from the basestation. Since specific examples of the above embodiments are the sameas described above, in order to avoid unnecessary repetition,descriptions of overlapping contents will be omitted.

The monitoring stopper 1630 may be configured to stop monitoring a PDCCHon the dormant BWP. Here, the BWP inactivity timer is not used based onthe activation of the dormant BWP, and the BWP inactivity timer may be atimer for a transition to a default BWP. Since specific examples of theabove embodiments are the same as described above, in order to avoidunnecessary repetition, descriptions of overlapping contents will beomitted.

Although not illustrated separately, the embodiments of the presentspecification also provide the following embodiments.

According to an embodiment, an apparatus includes at least one memoryand at least one processor being operatively connected to the at leastone memory, wherein the processor is configured to: control atransceiver to receive, from a base station, dormant BWP configurationinformation, wherein the dormant BWP configuration information isinformation about a DL BWP used as dormant BWP among at least one DL BWPconfigured for the UE; control the transceiver to receive, from the basestation, DCI notifying activation of the dormant BWP; and stopmonitoring of a PDCCH on the dormant BWP, wherein a BWP inactivity timeris not used based on the activation of the dormant BWP, and the BWPinactivity timer is a timer for a transition to a default BWP.

According to another embodiment, at least one computer readable mediumincludes instructions being executed by at least one processor, the atleast one processor is configured to: control a transceiver to receive,from a base station, dormant BWP configuration information, wherein thedormant BWP configuration information is information about a DL BWP usedas dormant BWP among at least one DL BWP configured for the UE: controlthe transceiver to receive, from the base station, DCI notifyingactivation of the dormant BWP; and stop monitoring of a PDCCH on thedormant BWP, wherein a BWP inactivity timer is not used based on theactivation of the dormant BWP, and the BWP inactivity timer is a timerfor a transition to a default BWP.

FIG. 17 is a flowchart of a method of transmitting dormant BWPconfiguration information from the viewpoint of a UE according to anembodiment of the present specification.

According to FIG. 17 , the base station may transmit the dormant BWPconfiguration information to a UE (S1710). Here, the dormant BWPconfiguration information may be information about a DL BWP used asdormant BWP among at least one DL BWP configured for the UE. Sincespecific examples of the above embodiments are the same as describedabove, in order to avoid unnecessary repetition, descriptions ofoverlapping contents will be omitted.

The base station may transmit DCI notifying activation of the dormantBWP to the UE (S1720). Here, the BWP inactivity timer is not used basedon the activation of the dormant BWP, and the BWP inactivity timer maybe a timer for a transition to a default BWP. Since specific examples ofthe above embodiments are the same as described above, in order to avoidunnecessary repetition, descriptions of overlapping contents will beomitted.

FIG. 18 is a block diagram of an example of an apparatus fortransmitting dormant BWP configuration information from the viewpoint ofa base station according to an embodiment of the present specification.

According to FIG. 18 , the processor 1800 may include a configurationinformation transmitter 1810 and a DCI transmitter 1820. Here, theprocessor 1800 may correspond to the processor to be described later (ordescribed above).

The configuration information transmitter 1610 may be configured tocontrol the transceiver to transmit dormant BWP configurationinformation to a UE. Here, the dormant BWP configuration information maybe information about a DL BWP used as dormant BWP among at least one DLBWP configured for the UE. Since specific examples of the aboveembodiments are the same as described above, in order to avoidunnecessary repetition, descriptions of overlapping contents will beomitted.

The DCI transmitter 1620 may be configured to control the transceiver totransmit DCI notifying activation of the dormant BWP to the UE. Here,the BWP inactivity timer is not used based on the activation of thedormant BWP, and the BWP inactivity timer may be a timer for atransition to a default BWP. Since specific examples of the aboveembodiments are the same as described above, in order to avoidunnecessary repetition, descriptions of overlapping contents will beomitted.

FIG. 19 illustrates a communication system 1 applied to the disclosure.

Referring to FIG. 19 , the communication system 1 applied to thedisclosure includes a wireless device, a base station, and a network.Here, the wireless device refers to a device that performs communicationusing a radio access technology (e.g., 5G new RAT (NR) or Long-TermEvolution (LTE)) and may be referred to as a communication/wireless/5Gdevice. The wireless device may include, but limited to, a robot 100 a,a vehicle 100 b-1 and 100 b-2, an extended reality (XR) device 100 c, ahand-held device 100 d, a home appliance 100 e, an Internet of things(IoT) device 100 f, and an AI device/server 400. For example, thevehicle may include a vehicle having a wireless communication function,an autonomous driving vehicle, a vehicle capable of inter-vehiclecommunication, or the like. Here, the vehicle may include an unmannedaerial vehicle (UAV) (e.g., a drone). The XR device may includeaugmented reality (AR)/virtual reality (VR)/mixed reality (MR) devicesand may be configured as a head-mounted device (HMD), a vehicularhead-up display (HUD), a television, a smartphone, a computer, awearable device, a home appliance, digital signage, a vehicle, a robot,or the like. The hand-held device may include a smartphone, a smartpad,a wearable device (e.g., a smart watch or smart glasses), and a computer(e.g., a notebook). The home appliance may include a TV, a refrigerator,a washing machine, and the like. The IoT device may include a sensor, asmart meter, and the like. The base station and the network may beconfigured, for example, as wireless devices, and a specific wirelessdevice 200 a may operate as a base station/network node for otherwireless devices.

Here, the wireless communication technology implemented in the wirelessdevice of the present disclosure may include a narrowband Internet ofThings for low-power communication as well as LTE, NR, and 6G. At thistime, for example, NB-IoT technology may be an example of low power widearea network (LPWAN) technology, and may be implemented in standardssuch as LTE Cat NB1 and/or LTE Cat NB2, may be implemented in thestandard of LTE Cat NB1 and/or LTE Cat NB2, and is not limited to thenames mentioned above. Additionally or alternatively, the wirelesscommunication technology implemented in the wireless device of thepresent disclosure may perform communication based on LTE-M technology.In this case, as an example, the LTE-M technology may be an example ofan LPWAN technology, and may be called by various names such as enhancedmachine type communication (eMTC). For example, LTE-M technology may beimplemented by at least any one of various standards such as 1) LTE CAT0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited),5) LTE-MTC, 6) LTE Machine Type Communication, and/or 7) LTE M, and isnot limited to the names described above. Additionally or alternatively,the wireless communication technology implemented in the wireless deviceof the present disclosure may include at least one of ZigBee. Bluetooth,and LPWAN considering low power communication and is not limited to thenames described above. For example, the ZigBee technology may createpersonal area networks (PAN) related to small/low-power digitalcommunication based on various standards such as IEEE 802.15.4, and maybe called by various names.

The wireless devices 100 a to 100 f may be connected to the network 300through the base station 200. Artificial intelligence (AI) technologymay be applied to the wireless devices 100 a to 100 f, and the wirelessdevices 100 a to 100 f may be connected to an AI server 400 through thenetwork 300. The network 300 may be configured using a 3G network, a 4G(e.g., LTE) network, or a 5G (e.g., NR) network. The wireless devices100 a to 100 f may communicate with each other via the base station200/network 300 and may also perform direct communication (e.g. sidelinkcommunication) with each other without passing through the basestation/network. For example, the vehicles 100 b-1 and 100 b-2 mayperform direct communication (e.g. vehicle-to-vehicle(V2V)/vehicle-to-everything (V2X) communication). Further, the IoTdevice (e.g., a sensor) may directly communicate with another IoT device(e.g., a sensor) or another wireless device 100 a to 100 f.

Wireless communications/connections 150 a, 150 b, and 150 c may beestablished between the wireless devices 100 a to 100 f and the basestation 200 and between the base stations 200. Here, the wirelesscommunications/connections may be established by various wireless accesstechnologies (e.g., 5G NR), such as uplink/downlink communication 150 a,sidelink communication 150 b (or D2D communication), and inter-basestation communication 150 c (e.g., relay or integrated access backhaul(TAB)). The wireless devices and the base station/wireless devices, andthe base stations may transmit/receive radio signals to/from each otherthrough the wireless communications/connections 150 a, 150 b, and 150 c.For example, the wireless communications/connections 150 a, 150 b, and150 c may transmit/receive signals over various physical channels. Tothis end, at least some of various configuration information settingprocesses, various signal processing processes (e.g., channelencoding/decoding, modulation/demodulation, resource mapping/demapping,and the like), and resource allocation processes may be performed on thebasis of various proposals of the disclosure.

Meanwhile, NR supports a plurality of numerologies (or a plurality ofranges of subcarrier spacing (SCS)) in order to support a variety of 5Gservices. For example, when SCS is 15 kHz, a wide area in traditionalcellular bands is supported; when SCS is 30 kHz/60 kHz, a dense-urban,lower-latency, and wider-carrier bandwidth is supported; when SCS is 60kHz or higher, a bandwidth greater than 24.25 GHz is supported toovercome phase noise.

NR frequency bands may be defined as frequency ranges of two types (FR1and FR2). The values of the frequency ranges may be changed. Forexample, the frequency ranges of the two types (FR1 and FR2) may be asshown in Table 4. For convenience of description, FR1 of the frequencyranges used for an NR system may refer to a “sub 6 GHz range”, and FR2may refer to an “above 6 GHz range” and may be referred to as amillimeter wave (mmW).

TABLE 4 Frequency range Corresponding frequency designation rangeSubcarrier spacing FR1  450 MHz-6000 MHz  15, 30, 60 kHz FR2 24250MHz-52600 MHz 60, 120, 240 kHz

As Illustrated above, the values of the frequency ranges or the NRsystem may be changed. For example, FR1 may include a band from 410 MHzto 7125 MHz as shown in Table 5. That is, FR1 may include a frequencyband of 6 GHz (or 5850, 5900, 5925 MHz, or the like) or greater. Forexample, the frequency band of 6 GHz (or 5850, 5900, 5925 MHz, or thelike) or greater included in FR1 may include an unlicensed band. Theunlicensed bands may be used for a variety of purposes, for example, forvehicular communication (e.g., autonomous driving).

TABLE 5 Frequency range Corresponding frequency designation rangeSubcarrier spacing FR1  410 MHz-7125 MHz  15, 30, 60 kHz FR2 24250MHz-52600 MHz 60, 120, 240 kHz

Hereinafter, an example of a wireless device to which the disclosure isapplied is described. FIG. 20 illustrates a wireless device that isapplicable to the disclosure.

Referring to FIG. 20 , a first wireless device 100 and a second wirelessdevice 200 may transmit and receive radio signals through various radioaccess technologies (e.g., LTE and NR). Here, the first wireless device100 and the second wireless device 200 may respectively correspond to awireless device 100 x and the base station 200 of FIG. 19 and/or mayrespectively correspond to a wireless device 100 x and a wireless device100 x of FIG. 19 .

The first wireless device 100 includes at least one processor 102 and atleast one memory 104 and may further include at least one transceiver106 and/or at least one antenna 108. The processor 102 may be configuredto control the memory 104 and/or the transceiver 106 and to implementthe descriptions, functions, procedures, proposals, methods, and/oroperational flowcharts disclosed herein. For example, the processor 102may process information in the memory 104 to generate firstinformation/signal and may then transmit a radio signal including thefirst information/signal through the transceiver 106. In addition, theprocessor 102 may receive a radio signal including secondinformation/signal through the transceiver 106 and may store informationobtained from signal processing of the second information/signal in thememory 104. The memory 104 may be connected to the processor 102 and maystore various pieces of information related to the operation of theprocessor 102. For example, the memory 104 may store a software codeincluding instructions to perform some or all of processes controlled bythe processor 102 or to perform the descriptions, functions, procedures,proposals, methods, and/or operational flowcharts disclosed herein.Here, the processor 102 and the memory 104 may be part of acommunication modem/circuit/chip designed to implement a radiocommunication technology (e.g., LTE or NR). The transceiver 106 may beconnected with the processor 102 and may transmit and/or receive a radiosignal via the at least one antennas 108. The transceiver 106 mayinclude a transmitter and/or a receiver. The transceiver 106 may bereplaced with a radio frequency (RF) unit. In the disclosure, thewireless device may refer to a communication modem/circuit/chip.

The second wireless device 200 includes at least one processor 202 andat least one memory 204 and may further include at least one transceiver206 and/or at least one antenna 208. The processor 202 may be configuredto control the memory 204 and/or the transceiver 206 and to implementthe descriptions, functions, procedures, proposals, methods, and/oroperational flowcharts disclosed herein. For example, the processor 202may process information in the memory 204 to generate thirdinformation/signal and may then transmit a radio signal including thethird information/signal through the transceiver 206. In addition, theprocessor 202 may receive a radio signal including fourthinformation/signal through the transceiver 206 and may store informationobtained from signal processing of the fourth information/signal in thememory 204. The memory 204 may be connected to the processor 202 and maystore various pieces of information related to the operation of theprocessor 202. For example, the memory 204 may store a software codeincluding instructions to perform some or all of processes controlled bythe processor 202 or to perform the descriptions, functions, procedures,proposals, methods, and/or operational flowcharts disclosed herein.Here, the processor 202 and the memory 204 may be part of acommunication modem/circuit/chip designed to implement a radiocommunication technology (e.g., LTE or NR). The transceiver 206 may beconnected with the processor 202 and may transmit and/or receive a radiosignal via the at least one antennas 208. The transceiver 206 mayinclude a transmitter and/or a receiver. The transceiver 206 may bereplaced with an RF unit. In the disclosure, the wireless device mayrefer to a communication modem/circuit/chip.

Hereinafter, hardware elements of the wireless devices 100 and 200 aredescribed in detail. At least one protocol layer may be implemented, butlimited to, by the at least one processor 102 and 202. For example, theat least one processor 102 and 202 may implement at least one layer(e.g., a functional layer, such as PHY, MAC, RLC, PDCP, RRC, and SDAPlayers). The at least one processor 102 and 202 may generate at leastone protocol data unit (PDU) and/or at least one service data unit (SDU)according to the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed herein. The at leastone processor 102 and 202 may generate a message, control information,data, or information according to the descriptions, functions,procedures, proposals, methods, and/or operational flowcharts disclosedherein. The at least one processor 102 and 202 may generate a signal(e.g., a baseband signal) including a PDU, an SDU, a message, controlinformation, data, or information according to the functions,procedures, proposals, and/or methods disclosed herein and may providethe signal to the at least one transceiver 106 and 206. The at least oneprocessor 102 and 202 may receive a signal (e.g., a baseband signal)from the at least one transceiver 106 and 206 and may obtain a PDU, anSDU, a message, control information, data, or information according tothe descriptions, functions, procedures, proposals, methods, and/oroperational flowcharts disclosed herein.

The at least one processor 102 and 202 may be referred to as acontroller, a microcontroller, a microprocessor, or a microcomputer. Theat least one processor 102 and 202 may be implemented by hardware,firmware, software, or a combination thereof. For example, at least oneapplication-specific integrated circuit (ASIC), at least one digitalsignal processor (DSP), at least one digital signal processing devices(DSPD), at least one programmable logic devices (PLD), or at least onefield programmable gate array (FPGA) may be included in the at least oneprocessor 102 and 202. The descriptions, functions, procedures,proposals, methods, and/or operational flowcharts disclosed herein maybe implemented using firmware or software, and the firmware or softwaremay be configured to include modules, procedures, functions, and thelike. The firmware or software configured to perform the descriptions,functions, procedures, proposals, methods, and/or operational flowchartsdisclosed herein may be included in the at least one processor 102 and202 or may be stored in the at least one memory 104 and 204 and may beexecuted by the at least one processor 102 and 202. The descriptions,functions, procedures, proposals, methods, and/or operational flowchartsdisclosed herein may be implemented in the form of a code, aninstruction, and/or a set of instructions using firmware or software.

The at least one memory 104 and 204 may be connected to the at least oneprocessor 102 and 202 and may store various forms of data, signals,messages, information, programs, codes, indications, and/or commands.The at least one memory 104 and 204 may be configured as a ROM, a RAM,an EPROM, a flash memory, a hard drive, a register, a cache memory, acomputer-readable storage medium, and/or a combinations thereof. The atleast one memory 104 and 204 may be disposed inside and/or outside theat least one processor 102 and 202. In addition, the at least one memory104 and 204 may be connected to the at least one processor 102 and 202through various techniques, such as a wired or wireless connection.

The at least one transceiver 106 and 206 may transmit user data, controlinformation, a radio signal/channel, or the like mentioned in themethods and/or operational flowcharts disclosed herein to at leastdifferent device. The at least one transceiver 106 and 206 may receiveuser data, control information, a radio signal/channel, or the likementioned in the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed herein from at leastone different device. For example, the at least one transceiver 106 and206 may be connected to the at least one processor 102 and 202 and maytransmit and receive a radio signal. For example, the at least oneprocessor 102 and 202 may control the at least one transceiver 106) and206 to transmit user data, control information, or a radio signal to atleast one different device. In addition, the at least one processor 102and 202 may control the at least one transceiver 106 and 206 to receiveuser data, control information, or a radio signal from at least onedifferent device. The at least one transceiver 106 and 206 may beconnected to the at least one antenna 108 and 208 and may be configuredto transmit or receive user data, control information, a radiosignal/channel, or the like mentioned in the descriptions, functions,procedures, proposals, methods, and/or operational flowcharts disclosedherein through the at least one antenna 108 and 208. In this document,the at least one antenna may be a plurality of physical antennas or maybe a plurality of logical antennas (e.g., antenna ports). The at leastone transceiver 106 and 206 may convert a received radio signal/channelfrom an RF band signal into a baseband signal in order to processreceived user data, control information, a radio signal/channel, or thelike using the at least one processor 102 and 202. The at least onetransceiver 106 and 206 may convert user data, control information, aradio signal/channel, or the like, processed using the at least oneprocessor 102 and 202, from a baseband signal to an RF bad signal. Tothis end, the at least one transceiver 106 and 206 may include an(analog) oscillator and/or a filter.

FIG. 21 illustrates another example of a w % ireless device applicableto the present disclosure.

Referring to FIG. 21 , a wireless device may include at least oneprocessor 102, 202, at least one memory 104, 204, at least onetransceiver 106, 206, and one or more antennas 108, 208.

As a difference between the example of the wireless device describedabove in FIG. 20 and the example of the wireless device in FIG. 21 , theprocessors 102 and 202 and the memories 104 and 204 are separated inFIG. 20 , and the processors 102 and 202 include the memories 104 and204 in FIG. 21 .

Here, the specific description of the processor 102, 202, the memory104, 204, the transceiver 106, 206, and one or more antennas 108, 208 issame as described above, repeated descriptions will be omitted in orderto avoid unnecessary repetition of descriptions.

Hereinafter, an example of a signal processing circuit to which thedisclosure is applied is described.

FIG. 22 illustrates a signal processing circuit for a transmissionsignal.

Referring to FIG. 22 , the signal processing circuit 1000 may include ascrambler 1010, a modulator 1020, a layer mapper 1030, a precoder 1040,a resource mapper 1050, and a signal generator 1060.Operations/functions illustrated with reference to FIG. 22 may beperformed, but not limited to, in the processor 102 and 202 and/or thetransceiver 106 and 206 of FIG. 20 . Hardware elements illustrated inFIG. 22 may be configured in the processor 102 and 202 and/or thetransceiver 106 and 206 of FIG. 20 . For example, blocks 1010 to 1060may be configured in the processor 102 and 202 of FIG. 20 .Alternatively, blocks 1010 to 1050 may be configured in the processor102 and 202 of FIG. 20 , and a block 1060 may be configured in thetransceiver 106 and 206 of FIG. 20 .

A codeword may be converted into a radio signal via the signalprocessing circuit 1000 of FIG. 22 . Here, the codeword is an encodedbit sequence of an information block. The information block may includea transport block (e.g., a UL-SCH transport block and a DL-SCH transportblock). The radio signal may be transmitted through various physicalchannels (e.g., a PUSCH or a PDSCH).

Specifically, the codeword may be converted into a scrambled bitsequence by the scrambler 1010. A scrambled sequence used for scramblingis generated on the basis of an initialization value, and theinitialization value may include ID information about a wireless device.The scrambled bit sequence may be modulated into a modulation symbolsequence by the modulator 1020. A modulation scheme may includepi/2-binary phase shift keying (pi/2-BPSK), m-phase shift keying(m-PSK), m-quadrature amplitude modulation (m-QAM), and the like. Acomplex modulation symbol sequence may be mapped to at least onetransport layer by the layer mapper 1030. Modulation symbols of eachtransport layer may be mapped to a corresponding antenna port(s) by theprecoder 1040 (precoding). Output z from the precoder 1040 may beobtained by multiplying output y from the layer mapper 1030 by aprecoding matrix W of N*M, where N is the number of antenna ports, and Mis the number of transport layers. Here, the precoder 1040 may performprecoding after performing transform precoding (e.g., DFT transform) oncomplex modulation symbols. Alternatively, the precoder 1040 may performprecoding without performing transform precoding.

The resource mapper 1050 may map a modulation symbol of each antennaport to a time-frequency resource. The time-frequency resource mayinclude a plurality of symbols (e.g., CP-OFDMA symbols or DFT-s-OFDMAsymbols) in the time domain and may include a plurality of subcarriersin the frequency domain. The signal generator 1060 may generate a radiosignal from mapped modulation symbols, and the generated radio signalmay be transmitted to another device through each antenna. To this end,the signal generator 1060 may include an inverse fast Fourier transform(IFFT) module, a cyclic prefix (CP) inserter, a digital-to-analogconverter (DAC), a frequency upconverter, and the like.

A signal processing procedure for a received signal in a wireless devicemay be performed in the reverse order of the signal processing procedure1010 to 1060 of FIG. 22 . For example, a wireless device (e.g., 100 and200 of FIG. 20 ) may receive a radio signal from the outside through anantenna port/transceiver. The received radio signal may be convertedinto a baseband signal through a signal reconstructor. To this end, thesignal reconstructor may include a frequency downconverter, ananalog-to-digital converter (ADC), a CP remover, and a fast Fouriertransform (FFT) module. The baseband signal may be reconstructed to acodeword through resource demapping, postcoding, demodulation, anddescrambling. The codeword may be reconstructed to an originalinformation block through decoding. Thus, a signal processing circuit(not shown) for a received signal may include a signal reconstructor, aresource demapper, a postcoder, a demodulator, a descrambler and adecoder.

Hereinafter, an example of utilizing a wireless device to which thedisclosure is applied is described.

FIG. 23 illustrates another example of a wireless device applied to thedisclosure. The wireless device may be configured in various formsdepending on usage/service.

Referring to FIG. 23 , the wireless devices 100 and 200 may correspondto the wireless device 100 and 200) of FIG. 20 and may include variouselements, components, units, and/or modules. For example, the wirelessdevice 100 and 200 may include a communication unit 110, a control unit120, a memory unit 130, and additional components 140. The communicationunit may include a communication circuit 112 and a transceiver(s) 114.For example, the communication circuit 112 may include the at least oneprocessor 102 and 202 and/or the at least one memory 104 and 204 of FIG.20 . For example, the transceiver(s) 114 may include the at least onetransceiver 106 and 206 and/or the at least one antenna 108 and 208 ofFIG. 20 . The control unit 120 is electrically connected to thecommunication unit 110, the memory unit 130, and the additionalcomponents 140 and controls overall operations of the wireless device.For example, the control unit 120 may control electrical/mechanicaloperations of the wireless device on the basis of aprogram/code/command/information stored in the memory unit 130. Inaddition, the control unit 120 may transmit information stored in thememory unit 130 to the outside (e.g., a different communication device)through a wireless/wired interface via the communication unit 110 or maystore, in the memory unit 130, information received from the outside(e.g., a different communication device) through the wireless/wiredinterface via the communication unit 110.

The additional components 140 may be configured variously depending onthe type of the wireless device. For example, the additional components140 may include at least one of a power unit/battery, an input/output(I/O) unit, a driving unit, and a computing unit. The wireless devicemay be configured, but not limited to, as a robot (100 a in FIG. 19 ), avehicle (100 b-1 or 100 b-2 in FIG. 19 ), an XR device (100 c in FIG. 19), a hand-held device (100 d in FIG. 19 ), a home appliance (100 e inFIG. 19 ), an IoT device (100 f in FIG. 19 ), a terminal for digitalbroadcasting, a hologram device, a public safety device, an MTC device,a medical device, a fintech device (or financial device), a securitydevice, a climate/environmental device, an AI server/device (400 in FIG.19 ), a base station (200 in FIG. 19 ), a network node, or the like. Thewireless device may be mobile or may be used in a fixed place dependingon usage/service.

In FIG. 23 , all of the various elements, components, units, and/ormodules in the wireless devices 100 and 200 may be connected to eachother through a wired interface, or at least some thereof may bewirelessly connected through the communication unit 110. For example,the control unit 120 and the communication unit 110 may be connected viaa cable in the wireless device 100 and 200, and the control unit 120 anda first unit (e.g., 130 and 140) may be wirelessly connected through thecommunication unit 110. In addition, each element, component, unit,and/or module in wireless device 100 and 200 may further include atleast one element. For example, the control unit 120 may include atleast one processor set. For example, the control unit 120 may beconfigured as a set of a communication control processor, an applicationprocessor, an electronic control unit (ECU), a graphics processingprocessor, a memory control processor, and the like. In another example,the memory unit 130 may include a random-access memory (RAM), a dynamicRAM (DRAM), a read-only memory (ROM), a flash memory, a volatile memory,a non-volatile memory, and/or a combination thereof.

Next, an illustrative configuration of FIG. 23 is described in detailwith reference to the accompanying drawing.

FIG. 24 illustrates a hand-held device applied to the disclosure. Thehand-held device may include a smartphone, a smartpad, a wearable device(e.g., a smart watch or smart glasses), and a portable computer (e.g., anotebook). The hand-held device may be referred to as a mobile station(MS), a user terminal (UT), a mobile subscriber station (MSS), asubscriber station (SS), an advanced mobile station (AMS), or a wirelessterminal (WT).

Referring to FIG. 24 , the hand-held device 100 may include an antennaunit 108, a communication unit 110, a control unit 120, a memory unit130, a power supply unit 140 a, an interface unit 140 b, and aninput/output unit 140 c. The antenna unit 108 may be configured as a panof the communication unit 110. Blocks 110 to 130/140 a to 140 ccorrespond to the blocks 110 to 130/140 in FIG. 23 , respectively.

The communication unit 110 may transmit and receive a signal (e.g.,data, a control signal, or the like) to and from other wireless devicesand base stations. The control unit 120 may control various componentsof the hand-held device 100 to perform various operations. The controlunit 120 may include an application processor (AP). The memory unit 130may store data/parameter/program/code/command necessary to drive thehand-held device 100. Further, the memory unit 130 may storeinput/output data/information. The power supply unit 140 a suppliespower to the hand-held device 100 and may include a wired/wirelesscharging circuit, a battery, and the like. The interface unit 140 b maysupport a connection between the hand-held device 100 and a differentexternal device. The interface unit 140 b may include various ports(e.g., an audio input/output port and a video input/output port) forconnection to an external device. The input/output unit 140 c mayreceive or output image information/signal, audio information/signal,data, and/or information input from a user. The input/output unit 140 cmay include a camera, a microphone, a user input unit, a display unit140 d, a speaker, and/or a haptic module.

For example, in data communication, the input/output unit 140 c mayobtain information/signal (e.g., a touch, text, voice, an image, and avideo) input from the user, and the obtained information/signal may bestored in the memory unit 130. The communication unit 110 may convertinformation/signal stored in the memory unit into a radio signal and maytransmit the converted radio signal directly to a different wirelessdevice or to a base station. In addition, the communication unit 110 mayreceive a radio signal from a different wireless device or the basestation and may reconstruct the received radio signal to originalinformation/signal. The reconstructed information/signal may be storedin the memory unit 130 and may then be output in various forms (e.g.,text, voice, an image, a video, and a haptic form) through theinput/output unit 140 c.

FIG. 25 illustrates a vehicle or an autonomous driving vehicle appliedto the disclosure. The vehicle or the autonomous driving may beconfigured as a mobile robot, a car, a train, a manned/unmanned aerialvehicle (AV), a ship, or the like.

Referring to FIG. 25 , the vehicle or the autonomous driving vehicle 100may include an antenna unit 108, a communication unit 110, a controlunit 120, a driving unit 140 a, a power supply unit 140 b, a sensor unit140 c, and an autonomous driving unit 140 d. The antenna unit 108 may beconfigured as a part of the communication unit 110. Blocks 110/130/140 ato 140 d correspond to the blocks 110/130/140 in FIG. 23 , respectively.

The communication unit 110 may transmit and receive a signal (e.g.,data, a control signal, or the like) to and from external devices, suchas a different vehicle, a base station (e.g. a base station, a road-sideunit, or the like), and a server. The control unit 120 may controlelements of the vehicle or the autonomous driving vehicle 100 to performvarious operations. The control unit 120 may include an electroniccontrol unit (ECU). The driving unit 140 a may enable the vehicle or theautonomous driving vehicle 100 to run on the ground. The driving unit140 a may include an engine, a motor, a power train, wheels, a brake, asteering device, and the like. The power supply unit 140 b suppliespower to the vehicle or the autonomous driving vehicle 100 and mayinclude a wired/wireless charging circuit, a battery, and the like. Thesensor unit 140 c may obtain a vehicle condition, environmentalinformation, user information, and the like. The sensor unit 140 c mayinclude an inertial measurement unit (IMU) sensor, a collision sensor, awheel sensor, a speed sensor, an inclination sensor, a weight sensor, aheading sensor, a position module, vehicular forward/backward visionsensors, a battery sensor, a fuel sensor, a tire sensor, a steeringsensor, a temperature sensor, a humidity sensor, an ultrasonic sensor,an illuminance sensor, a pedal position sensor, and the like. Theautonomous driving unit 140 d may implement a technology for maintaininga driving lane, a technology for automatically adjusting speed, such asadaptive cruise control, a technology for automatic driving along a setroute, a technology for automatically setting a route and driving when adestination is set, and the like.

For example, the communication unit 110 may receive map data, trafficcondition data, and the like from an external server. The autonomousdriving unit 140 d may generate an autonomous driving route and adriving plan on the basis of obtained data. The control unit 120 maycontrol the driving unit 140 a to move the vehicle or the autonomousdriving vehicle 100 along the autonomous driving route according to thedriving plan (e.g., speed/direction control). During autonomous driving,the communication unit 110 may aperiodically/periodically obtain updatedtraffic condition data from the external server and may obtainsurrounding traffic condition data from a neighboring vehicle. Further,during autonomous driving, the sensor unit 140 c may obtain a vehiclecondition and environmental information. The autonomous driving unit 140d may update the autonomous driving route and the driving plan on thebasis of newly obtained data/information. The communication unit 110 maytransmit information about a vehicle location, an autonomous drivingroute, a driving plan, and the like to the external server. The externalserver may predict traffic condition data in advance using AI technologyor the like on the basis of information collected from vehicles orautonomous driving vehicles and may provide the predicted trafficcondition data to the vehicles or the autonomous driving vehicles.

The appended claims of the present disclosure may be combined in variousways. For example, technical features of method claims of the presentdisclosure may be combined to be implemented as an apparatus, andtechnical features of apparatus claims of the present disclosure may becombined to be implemented as a method. Also, technical features ofmethod claims and technical features of apparatus claims of the presentdisclosure may be combined to be implemented as an apparatus, andtechnical features of method claims and technical features of apparatusclaims of the present disclosure may be combined to be implemented as amethod.

What is claimed is:
 1. A method of receiving dormant bandwidth part(BWP) configuration information in a wireless communication system, themethod being performed by a user equipment (UE) and comprising:receiving, from a base station, the dormant BWP configurationinformation through a radio resource control (RRC) message, wherein thedormant BWP configuration information includes information related to adownlink BWP to be used as dormant BWP among at least one downlink BWPconfigured for the UE; receiving, from the base station, first downlinkcontrol information (DCI), wherein an activation of the dormant BWP isdetermined based on the first DCI; stopping monitoring of a physicaldownlink control channel (PDCCH) on the dormant BWP based on thedetermination of the activation of the dormant BWP; and receiving, fromthe base station, second DCI, wherein an activation of a specific BWPwhich is different from the dormant BWP is determined based on thesecond DCI, and wherein a BWP inactivity timer is not used fortransitioning from the dormant BWP, which is activated, to a defaultBWP.
 2. The method of claim 1, wherein a maximum number of the at leastone downlink BWP is
 4. 3. The method of claim 1, wherein the default BWPis a BWP to which the UE transitions when the BWP inactivity timerexpires.
 4. The method of claim 1, wherein the dormant BWP is a BWPdifferent from the default BWP.
 5. The method of claim 1, wherein afield for scheduling the PDSCH reception included in the DCI isconfigured as a known bit.
 6. The method of claim 1, wherein the dormantBWP is activated, and based on running of the BWP inactivity timer, theUE stops the BWP inactivity timer.
 7. The method of claim 1, wherein theUE stops the BWP inactivity timer without a transition to the defaultBWP based on a release of the BWP inactivity timer.
 8. The method ofclaim 1, wherein the at least one downlink BWP is a downlink BWP for asecondary cell (SCell).
 9. The method of claim 8, wherein the at leastone downlink BWP includes the dormant BWP.
 10. The method of claim 9,wherein the at least one downlink BWP includes the default BWP.
 11. Auser equipment (UE) comprising: a transceiver; at least one memory; andat least one processor being operatively connected to the at least onememory and the transceiver, wherein the at least one processor isconfigured to: control the transceiver to receive, from a base station,dormant bandwidth part (BWP) configuration information through a radioresource control (RRC) message, wherein the dormant BWP configurationinformation includes information related to a downlink BWP to be used asdormant BWP among at least one downlink BWP configured for the UE;control the transceiver to receive, from the base station, firstdownlink control information (DCI), wherein an activation of the dormantBWP is determined based on the first DCI; stop monitoring of a physicaldownlink control channel (PDCCH) on the dormant BWP based on thedetermination of the activation of the dormant BWP; and receiving, fromthe base station, second DCI, wherein an activation of a specific BWPwhich is different from the dormant BWP is determined based on thesecond DCI, and wherein a BWP inactivity timer is not used fortransitioning from the dormant BWP, which is activated, to a defaultBWP.
 12. An apparatus comprising: at least one memory; and at least oneprocessor being operatively connected to the at least one memory,wherein the processor is configured to: control a transceiver toreceive, from a base station, dormant bandwidth part (BWP) configurationinformation through a radio resource control (RRC) message, wherein thedormant BWP configuration information includes information related to adownlink BWP to be used as dormant BWP among at least one downlink BWPconfigured for the apparatus; control the transceiver to receive, fromthe base station, first downlink control information (DCI), wherein anactivation of the dormant BWP is determined based on the first DCI; stopmonitoring of a physical downlink control channel (PDCCH) on the dormantBWP based on the determination of the activation of the dormant BWP; andreceiving, from the base station, second DCI, wherein an activation of aspecific BWP which is different from the dormant BWP is determined basedon the second DCI, and wherein a BWP inactivity timer is not used fortransitioning from the dormant BWP, which is activated, to a defaultBWP.